This manual covers the Case International 385, 485, 585, 685, and 885 tractor models, primarily produced during the 1980s and early 1990s. These tractors are known for their robust construction and reliability in agricultural applications, forming part of the esteemed Case IH lineage. While lacking modern technological features, their strength lies in their durable engineering and straightforward operation, making them dependable workhorses for various farming tasks. This workshop service manual is designed to provide comprehensive information for maintaining and repairing these essential agricultural machines. The purpose of this extensive service and repair manual is to serve as a complete resource for owners and professional mechanics. It details procedures for routine maintenance, diagnostic troubleshooting, and complete component rebuilds across all major systems, including the engine, fuel, cooling, lubrication, clutch, transmission, drive axle, PTO, hydraulics, steering, brakes, electrical system, chassis, and operator station. With easy-to-follow step-by-step instructions, diagrams, and precise technical specifications, this manual empowers users to perform repairs efficiently, reduce downtime, and ensure the longevity of their Case International tractors.